An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes

NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the L...
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Autor*in:	Abbott, JohnPaul R [verfasserIn] Gillis, Keith A Gorny, Lee J Moldover, Michael R

Format:	Artikel

Erschienen:	2016

Rechteinformationen:	Nutzungsrecht: © Acoustical Society of America

Systematik:	EQ 1000:

Übergeordnetes Werk:	Enthalten in: The journal of the Acoustical Society of America - Melville, NY : AIP, 1929, 139(2016), 4, Seite 2120-2120
Übergeordnetes Werk:	volume:139 ; year:2016 ; number:4 ; pages:2120-2120

Links:	Volltext Link aufrufen

DOI / URN:	10.1121/1.4950311

Katalog-ID:	OLC197545653X

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520			\|a NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources.
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allfields	10.1121/1.4950311 doi PQ20160610 (DE-627)OLC197545653X (DE-599)GBVOLC197545653X (PRQ)scitation_primary_10_1121_1_49503110 (KEY)0112299120160000139000402120acousticmodelofnistslongwavelengthacousticflowmete DE-627 ger DE-627 rakwb 530 DNB LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, JohnPaul R verfasserin aut An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Gorny, Lee J oth Moldover, Michael R oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 139(2016), 4, Seite 2120-2120 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:139 year:2016 number:4 pages:2120-2120 http://dx.doi.org/10.1121/1.4950311 Volltext http://dx.doi.org/10.1121/1.4950311 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 139 2016 4 2120-2120
spelling	10.1121/1.4950311 doi PQ20160610 (DE-627)OLC197545653X (DE-599)GBVOLC197545653X (PRQ)scitation_primary_10_1121_1_49503110 (KEY)0112299120160000139000402120acousticmodelofnistslongwavelengthacousticflowmete DE-627 ger DE-627 rakwb 530 DNB LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, JohnPaul R verfasserin aut An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Gorny, Lee J oth Moldover, Michael R oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 139(2016), 4, Seite 2120-2120 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:139 year:2016 number:4 pages:2120-2120 http://dx.doi.org/10.1121/1.4950311 Volltext http://dx.doi.org/10.1121/1.4950311 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 139 2016 4 2120-2120
allfields_unstemmed	10.1121/1.4950311 doi PQ20160610 (DE-627)OLC197545653X (DE-599)GBVOLC197545653X (PRQ)scitation_primary_10_1121_1_49503110 (KEY)0112299120160000139000402120acousticmodelofnistslongwavelengthacousticflowmete DE-627 ger DE-627 rakwb 530 DNB LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, JohnPaul R verfasserin aut An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Gorny, Lee J oth Moldover, Michael R oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 139(2016), 4, Seite 2120-2120 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:139 year:2016 number:4 pages:2120-2120 http://dx.doi.org/10.1121/1.4950311 Volltext http://dx.doi.org/10.1121/1.4950311 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 139 2016 4 2120-2120
allfieldsGer	10.1121/1.4950311 doi PQ20160610 (DE-627)OLC197545653X (DE-599)GBVOLC197545653X (PRQ)scitation_primary_10_1121_1_49503110 (KEY)0112299120160000139000402120acousticmodelofnistslongwavelengthacousticflowmete DE-627 ger DE-627 rakwb 530 DNB LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, JohnPaul R verfasserin aut An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Gorny, Lee J oth Moldover, Michael R oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 139(2016), 4, Seite 2120-2120 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:139 year:2016 number:4 pages:2120-2120 http://dx.doi.org/10.1121/1.4950311 Volltext http://dx.doi.org/10.1121/1.4950311 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 139 2016 4 2120-2120
allfieldsSound	10.1121/1.4950311 doi PQ20160610 (DE-627)OLC197545653X (DE-599)GBVOLC197545653X (PRQ)scitation_primary_10_1121_1_49503110 (KEY)0112299120160000139000402120acousticmodelofnistslongwavelengthacousticflowmete DE-627 ger DE-627 rakwb 530 DNB LING fid EQ 1000: AVZ rvk 33.12 bkl 50.36 bkl Abbott, JohnPaul R verfasserin aut An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes 2016 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources. Nutzungsrecht: © Acoustical Society of America Gillis, Keith A oth Gorny, Lee J oth Moldover, Michael R oth Enthalten in The journal of the Acoustical Society of America Melville, NY : AIP, 1929 139(2016), 4, Seite 2120-2120 (DE-627)129550264 (DE-600)219231-7 (DE-576)015003663 0001-4966 nnns volume:139 year:2016 number:4 pages:2120-2120 http://dx.doi.org/10.1121/1.4950311 Volltext http://dx.doi.org/10.1121/1.4950311 GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-LING SSG-OLC-PHY SSG-OLC-MUS GBV_ILN_59 GBV_ILN_60 GBV_ILN_70 GBV_ILN_120 GBV_ILN_170 GBV_ILN_201 GBV_ILN_2006 GBV_ILN_2011 GBV_ILN_2027 GBV_ILN_2045 GBV_ILN_2192 GBV_ILN_2256 GBV_ILN_4219 GBV_ILN_4315 GBV_ILN_4319 GBV_ILN_4700 EQ 1000: 33.12 AVZ 50.36 AVZ AR 139 2016 4 2120-2120
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author	Abbott, JohnPaul R
spellingShingle	Abbott, JohnPaul R ddc 530 fid LING rvk EQ 1000: bkl 33.12 bkl 50.36 An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
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title	An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
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title_full	An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
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title_sort	acoustic model of nist’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
title_auth	An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
abstract	NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources.
abstractGer	NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources.
abstract_unstemmed	NIST is investigating long-wavelength acoustic flowmeter (LWAF) technology to accurately measure gas flow in large-diameter pipes, such as smokestacks used by coal-burning power plants. To aid in the data analysis and development of the method, we constructed a lumped-element acoustic model of the LWAF based on existing theory for sound propagation in circular ducts, modified to include flow. The model calculates the ratio of the acoustic pressure amplitudes and phase differences between two locations in a partial standing wave downstream of a continuous sound source up to the duct’s cut-on frequency. We used the numerical calculations of the reflection coefficient by Munt [J. Sound Vibration 142, 413–436 (1990)] to model the radiation impedance as a function of flow speed. In the absence of flow, the model was used to calibrate the positions of several microphones in the LWAF. In the presence of flow, the model predicts qualitatively the measured amplitude ratios and phase differences as a function of flow rate. Quantitative comparison is limited by the uncertainty of the radiation impedance and its flow dependence. This limitation prompts us to investigate ways to either measure the radiation impedance or eliminate it by using multiple coherent sound sources.
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title_short	An acoustic model of NIST’s long-wavelength acoustic flowmeter for gas flow in large-diameter pipes
url	http://dx.doi.org/10.1121/1.4950311
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author2	Gillis, Keith A Gorny, Lee J Moldover, Michael R
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